atelocephalous

例句：

1. 1. The cephalopods are a group of marine animals that include squid, octopus,and cuttlefish.
   头足纲动物是一类海洋动物，包括鱿鱼、章鱼和乌贼。
2. 2. The cephalopods have unique features that distinguish them from other animals.
   头足纲动物具有独特的特征，这使得它们与其他动物区别开来。
3. 3. In the study of biology, the cephalopods are often used as models for studying the behavior of other animals.
   在生物学研究中，头足纲动物经常被用作研究其他动物行为的模型。